Suffolk County Council has delayed its decision on devolution.
The move comes amid rumours that the Government may bring forward the date of planned mayoral elections.
The decision, originally expected on October 15, will now be made on November 12 to allow councillors to consider all relevant information before moving forward.
Michael Hadwen, leader of Suffolk County Council, said: "My only duty is to the people of Suffolk.
"I am unapologetically Suffolk first in everything I do in my role as leader of the county council.
"We need to ensure that we get this right and that a new authority is set up properly – I am determined that any devolution deal is in the best interests of our county.
"We are hearing strong rumours that ministers are considering changing the date of the mayoral elections once again.
"I therefore cannot ask my cabinet to make a decision on the future of devolution without that essential piece of information.
"We are deferring our cabinet decision on devolution for a month while the government gets its house in order.
"This will allow us to continue our negotiations with Norfolk."
Reform UK leaders in Norfolk have written to Prime Minister Andy Burnham, calling for the vote to be moved forward to 2027.
However, their counterparts in Suffolk believe more time is needed to prepare.
The two counties are also finalising a fresh deal that aims to ensure more equal funding between the two rival counties.
The devolution plans would see the setting up of a Mayoral Strategic Authority in Norfolk and Suffolk.
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